Improvement in valve-bearings for steam-engines



` the drawings b, theeXhaust-opening.

UNITED STATES VPATENT OFFICE.

WILLIAM EUEEows, 0E AsToEIA, ILLINoIs.

IMPROVEMENT IN VALVE-BEARINGS FOR STEAM-ENGINES.

Specification forming part of Letters Patent No. l 50,522, dated May 5, 1874; application filed February 13, 1874.

To all whom it may concern:

Be it known that I, WILLIAM BUERows, of Astoria, county of Fulton and State of Illinois, have invented a new and useful Improve- Inentin Valve-Bearing for Steam-Engines; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing making a part of this specification, in which- Figure l is a perspective view of the base or supporting frame and the valve -working devices of my engine. Fig. 2 is a side elevation of the steam-chests. Fig. 3 is an end elevation of Fig. 2, and Fig. 4 is a sectional view on the plane of the line @c w.

Referring to the parts by letters, letter A represents the bed-plate or base, upon which theparts of the supporting devices are mounted; D, the steam-chest with a rotary valve, C, and

- has a chamber, D, above it, in which is a rotary valve, D'. E is the steam-inlet pipe. e is an opening from chamber D to steam-chest B; b b', openings from the steam-chest to the interior of any steam-cylinder; (not shown in rIhe stems of the valves C and D are extended, as shown plainly at Fig. 2, and are provided with suitable steam-packing where they pass through the walls of their respective steamchambers, and are provided with bearings S at their outer ends, which bearings are made adjustable vertically by the set-screws s s, and laterally by the set-screws s s. (See Figs. 2

vand.) The valve G has two longitudinal grooves, o c', cut in its surface, so arranged that when one of them coincides with -or covers the exhaust-opening and with either of the openings b', the other will communicate with the interior of the steam-chest B and with the remaining opening b or b', as the case may be. The valve D has also two longitudinal grooves d d', which alternately open and'close the passage c. U

My improvement is shown as adapted for use with an engine having what is known as the linkanotion valve-gear, the construction of which is shown by Fig. 2 of the drawings.

The operation of my invention is as follows: The operation of the cut oif D is too well known to require description here. The valve C in the position shown at Fig. 4 will exhaust through the ports b b, and take steam through the ports c d, and vice versa. The adjustment of the valves to compensate for wear, Src., may be effected by the adjustable blocks S either in a vertical plane by the setscrews s, or a horizontal plane by the set-screws s, without taking the devices apart.

Having now described my invention, what I claim as new,and desire to secureby Letters Patent, is-

The valves C and D', having the extended stems, in combination with bearings S, and screws s and s', substantially as and for the purpose specified.

WILLIAM BURROWS.

Witnesses:

PLATT R. RIoHAnDs, M. H. BAERINGER. 

